package com.imooc.controller;

import com.imooc.VO.ProductInfoVo;
import com.imooc.VO.ProductVO;
import com.imooc.VO.ResultVo;
import com.imooc.dataobject.ProductCategory;
import com.imooc.dataobject.ProductInfo;
import com.imooc.service.CategoryService;
import com.imooc.service.ProductService;
import com.imooc.utils.ResultVOUtil;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 买家商品
 * Created by Asus on 2018/11/8.
 */

@RestController
@RequestMapping("/buyer/product")
public class BuyerProductController {

    @Autowired
    private ProductService productService;

    @Autowired
    private CategoryService categoryService;

    @GetMapping("/list")
    @Cacheable(cacheNames = "product" ,key = "123")
    public ResultVo list(){

        //1.查询所有的上架商品
        List<ProductInfo> productInfoList=productService.findUpAll();

        //2.查询类目（一次性查询）
//        List<Integer> categoryTypeList=new ArrayList<>();
//        //2.1传统方法
//        for(ProductInfo productInfo:productInfoList){
//            categoryTypeList.add(productInfo.getCategoryType());
//        }

        //2.2精简方法：利用java8方法，lambda表达式 可以实现过滤
        List<Integer> categoryTypeList=productInfoList.stream()
                                        .map(e ->e.getCategoryType())
                                        .collect(Collectors.toList());
        List<ProductCategory> productCategoryList=categoryService.findByCategoryTypeIn(categoryTypeList);

        //3.数据拼装
        List<ProductVO> productVOList=new ArrayList<>();
        for(ProductCategory productCategory:productCategoryList){
            ProductVO productVO=new ProductVO();
            productVO.setCategoryType(productCategory.getCategoryType());
            productVO.setCategoryName(productCategory.getCategoryName());


            List<ProductInfoVo> productInfoVoList=new ArrayList<>();
            for (ProductInfo productInfo:productInfoList){
                if(productInfo.getCategoryType().equals(productCategory.getCategoryType())){
                    ProductInfoVo productInfoVo=new ProductInfoVo();
                    BeanUtils.copyProperties(productInfo,productInfoVo);
                    productInfoVoList.add(productInfoVo);
                }
            }
            productVO.setProductInfoVoList(productInfoVoList);
            productVOList.add(productVO);
        }


        return ResultVOUtil.success(productVOList);
    }

}
